body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #07111f, #0f4c81);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-form {
    background: white;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
}

.login-form h1 {
    text-align: center;
    margin-bottom: 8px;
}

.login-form p {
    text-align: center;
    color: #64748b;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 13px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-size: 15px;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #1e88ff;
}

button {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 10px;
    background: #1e88ff;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background: #006be6;
}

.register-link {
    text-align: center;
    margin-top: 22px;
    color: #64748b;
    font-size: 15px;
}

.register-link p {
    margin-bottom: 8px;
}

.register-link a {
    display: inline-block;
    color: #1e88ff;
    text-decoration: none;
    font-weight: bold;
    transition: 0.2s;
}

.register-link a:hover {
    color: #006be6;
    text-decoration: underline;
}

.error {
    background: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 18px;
    text-align: center;
}